建筑声学.根据元件性能对建筑物声学性能的估计.第4部分：室内声音向室外的传输

[中文适用范围]： 本文件规定了一个计算模型，主要通过测量建筑物内部的声压级和表征相关元件声音传输的测量数据来估计建筑物围护结构由于建筑物内部的空气传播声音而辐射的声功率级。 以及建筑围护结构中的开口。 这些声功率级与建筑物围护结构内或前面的其他声源的声功率级一起构成计算距建筑物选定距离处的声压级的基础，作为建筑物声学性能的衡量标准。 根据室内声源的知识预测内部声压级超出了本文件的范围。 室外声音传播的预测不属于本文件的范围。 注：对于简单的传播条件，附录 E 中给出了声压级的估计方法。 本文件描述了计算模型的原理，列出了相关量并定义了其应用和限制。 [外文原描述]： ISO 12354-4:2017 specifies a calculation model to estimate the sound power level radiated by the envelope of a building due to airborne sound inside that building, primarily by means of measured sound pressure levels inside the building and measured data which characterize the sound transmission by the relevant elements and openings in the building envelope. These sound power levels, together with those of other sound sources in or in front of the building envelope, form the basis for the calculation of the sound pressure level at a chosen distance from a building as a measure for the acoustic performance of buildings. The prediction of the inside sound pressure level from knowledge of the indoor sound sources is outside the scope of this document. The prediction of the outdoor sound propagation is outside the scope of this document. NOTE For simple propagation conditions an approach is given for the estimation of the sound pressure level in Annex E. ISO 12354-4:2017 describes the principles of the calculation model, lists the relevant quantities and defines its applications and restrictions.